I have been fortunate to have an employer that is very understanding of my health issues (I have told them I have medical problems but have not gone into specifics). I have been able to cut back my hours and take time off when I needed to. The problem is that, even though I am usually physically able to work, my "brain fog" has gotten so bad that I am only doing actual work about 50% (or less) of the time I am there. I will literally catch myself just staring into space for long periods of time. I feel guilty for for basically stealing time from an employer that I like and has been very generous to me. But I need the money right now (kids in college). Not sure what to do. I have started chewing nicotine gum and it helps with fatigue but not concentration/mental sharpness. Not sure what to do.